You've made good points about not bringing up the CES letter or anything that could be called "anti-mormon. The reality is girlgasm while God gave us a gospel of love and stands always ready to give us a helping hand, his mercy will not rob his justice.
She will insist on raising her children in the Mormon church. It sounds like she's already considered marrying you and raising children in the church even with you being out of the church. I say to you, decisions determine destiny.